The main character, a working adult, finds himself reincarnated in the popular fantasy novel “The Tales of Lainana Country”. He was born as Absolute Ark, the eldest son of the Duke of Ark family. At first, he was happy to be reborn in the world he loved, but then he remembered that the Ark family he was born into was destined to be destroyed by the hero. “Since I’ve been reincarnated, I’m not going to be defeated by a Hero and his harem party. But I’ll meet them only when I’m fully prepared and give one a taste of his own medicine.”